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A kind of method of vanadium-containing by-product dephosphorization sludge and then vanadium extraction

A by-product, phosphorus sludge technology, applied in the field of metallurgy and chemical industry, can solve the problem of high energy consumption in operation, achieve the effect of simplifying operation process, reducing cost and improving purity

Active Publication Date: 2020-08-21
承德燕北冶金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the deficiencies in the prior art, the invention provides a method for vanadium-containing by-product dephosphorization mud and then vanadium extraction. The dephosphorization sludge obtained by adding calcium chloride to the leaching solution is reused again, so that the vanadium in the dephosphorization sludge is recovered and utilized to the greatest extent, and it also overcomes the disadvantage of high energy consumption in the operation of extracting vanadium from the dephosphorization sludge alone. Save costs and reduce the waste of resources and environmental pollution caused by the storage of phosphorus removal sludge

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  • A kind of method of vanadium-containing by-product dephosphorization sludge and then vanadium extraction

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Embodiment 1

[0043] This embodiment provides a method for removing phosphorus from vanadium-containing by-product mud and then extracting vanadium. The process flow chart of the vanadium extraction method is as follows figure 1 As shown, the specific steps are as follows:

[0044] (1) according to the mass ratio of 0.5:100, mix thick vanadium slag and the dephosphorization mud of water content 30wt.%, the moisture content in the dephosphorization mud is dried to 0.2wt.% through the heat that coarse vanadium slag carries, obtains mixed powder body;

[0045] (II) mix sodium carbonate and mixed powder, pulverize, ball mill to 150 orders, in the aerobic atmosphere of oxygen concentration 35Vol.%, 900 ℃ roast 260min, obtain roasted solid, the quality of described sodium carbonate and described mixed powder The ratio is 1:14;

[0046] (III) Roasting the solid obtained in step (II) at 70° C. for 35 minutes, and filtering to obtain a leaching solution, the liquid-solid ratio of the leaching is 3...

Embodiment 2

[0050] This embodiment provides a method for removing phosphorus from vanadium-containing by-product mud and then extracting vanadium. The method for extracting vanadium includes the following steps:

[0051] (1) According to the mass ratio of 0.3:100, mix coarse vanadium slag and the dephosphorization mud of water content 20wt.%, the moisture content in the dephosphorization mud is dried to 1wt.% through the heat of coarse vanadium slag, obtains mixed powder ;

[0052] (II) Mix sodium carbonate and mixed powder, pulverize, ball mill to 120 orders, in the aerobic atmosphere of oxygen concentration 40Vol.%, 850 ℃ roast 270min, obtain roasted solid, the quality of described sodium carbonate and described mixed powder The ratio is 1:12;

[0053] (III) Roasting the solid obtained in step (II) at 75° C. for 30 minutes, and filtering to obtain a leaching solution, the liquid-solid ratio of the leaching is 2 mL / g;

[0054] (IV) adding calcium chloride to the leaching solution obtai...

Embodiment 3

[0057] This embodiment provides a method for removing phosphorus from vanadium-containing by-product mud and then extracting vanadium. The method for extracting vanadium includes the following steps:

[0058] (1) According to the mass ratio of 0.2:100, mix coarse vanadium slag and the dephosphorization mud of water content 35wt.%, the moisture content in the dephosphorization mud is dried to 3wt.% through the heat of coarse vanadium slag, obtain mixed powder ;

[0059] (II) mix sodium carbonate and mixed powder, pulverize, ball mill to 200 orders, in the aerobic atmosphere of oxygen concentration 30Vol.%, 950 ℃ roast 250min, obtain roasted solid, the quality of described sodium carbonate and described mixed powder The ratio is 1:16;

[0060] (III) Roasting the solid obtained in step (II) at 65° C. for 40 minutes, and filtering to obtain a leaching solution, the liquid-solid ratio of the leaching is 4 mL / g;

[0061] (IV) adding calcium chloride to the leaching solution obtain...

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Abstract

The invention relates to a method for conducting secondary vanadium extraction on a vanadium-contained by-product phosphorous removing mud. The method comprises the following steps that 1, phosphorousremoving mud and coarse vanadium residues are mixed according to a mass ratio of (0.2 to 1) to 100; 2, sodium carbonate is added into mixed power for vanadium extraction; 3, phosphorous removing mudobtained by adding calcium chloride into a leaching liquid subjected to vanadium extraction is reused in the step 1. The coarse vanadium residues generated by a converter has higher temperature, the phosphorous removing mud generated in a sodium treatment vanadium extraction process contains 15-40wt.% of moisture, moreover, the phosphorous removing mud contains impurities of silicon, aluminium andthe like, suction filtering is hard, heat of the coarse vanadium residues is used for drying the phosphorous removing mud, and the phosphorous removing mud and the coarse vanadium residues are mixed,so that not only is the utilization rate of heat energy improved to improve a mixing effect of the phosphorous removing mud and the coarse vanadium residues, but also the cost of recovering metal vanadium from the phosphorous removing mud can be reduced, and economic benefits are high.

Description

technical field [0001] The invention belongs to the field of metallurgy and chemical industry, and in particular relates to a method for extracting vanadium by utilizing waste containing vanadium, in particular to a method for extracting vanadium from phosphorus mud by-products containing vanadium. Background technique [0002] Phosphorus removal sludge is the vanadium-containing waste produced by adding calcium chloride to the vanadium-containing waste liquid in order to reduce the phosphorus content in the vanadium-containing waste liquid during the production of vanadium pentoxide. [0003] Li Kunpeng published an article entitled Research on Vanadium Extraction Process from Phosphorus-Vanadium Slime (National Ferroalloy Symposium, 2014, 202-204), which pointed out that adding an appropriate amount of sodium carbonate to the phosphorus-removal mud can increase the leaching rate of vanadium and reduce the leaching rate. Phosphorus content. However, this method requires se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B1/02C22B34/22
CPCC22B1/02C22B7/001C22B7/006C22B34/22Y02P10/20
Inventor 周立伟王相宝林向丰刘利军宋林良于艳杰
Owner 承德燕北冶金材料有限公司